PDF Actual Sample: GB/T 1574-2007 (PDF-excerpt released/modified date: 2015-04-18/2019-03-24. Translated/reviewed by: Wayne Zheng et al.)
| Standard ID | GB/T 1574-2007 (GB/T1574-2007) |
| Description (Translated English) | Test method for analysis of coal ash |
| Sector / Industry | National Standard (Recommended) |
| Classification of Chinese Standard | D21 |
| Classification of International Standard | 73.040 |
| Word Count Estimation | 33,399 |
| Date of Issue | 2007-11-01 |
| Date of Implementation | 2008-06-01 |
| Older Standard (superseded by this standard) | GB/T 18856.13-2002; GB/T 4634-1996; GB/T 1574-1995 |
| Quoted Standard | GB/T 483 |
| Drafting Organization | CCRI coal analysis laboratory |
| Administrative Organization | National Coal Standardization Technical Committee |
| Regulation (derived from) | National Standard Approval Announcement 2007 No.12 (Total No.112) |
| Proposing organization | China Coal Industry Association |
| Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of PRC, China National Standardization Administration Committee |
| Summary | This standard specifies the determination of ash in iron, calcium, magnesium, potassium, analysis step, , equipment, reagents and materials sulfur, sodium, manganese, phosphorus, silicon, aluminum, titanium calculated results and the precision of the method. This standard applies to coal, Coke, CWS and gangue. |
ENGLISH: GB/T 1574-2007 (Translated) GB/T 1574-2007
GB
National Standard
of the People’s Republic of China
ICS 73.040
D 21
Replacing GB/T 1574-1995, GB/T 4634-1996, GB/T 18856.13-2002
Test Method for Analysis of Coal Ash
煤灰成分分析方法
ISSUED ON. NOVEMBER 1, 2007
IMPLEMENTED ON. JUNE 1, 2008
Jointly issued by. General Administration of Quality Supervision,
Inspection and Quarantine (AQSIQ);
Standardization Administration (SAC) of the People's
Republic of China.
Table of Content
1 Scope ... 4
2 Normative References ... 4
3 Reagents ... 4
4 Instruments and Equipment ... 4
5 Preparation of Ash Sample ... 5
6 Semi-microanalysis Method of Silica, Ferric Oxide, Titanium Dioxide, Aluminum Oxide,
Calcium Oxide and Magnesium Oxide ... 5
6.1 Preparation of Test Solution ... 5
6.2 Determination of Silicon Dioxide (Silicon Molybdenum Blue Spectrophotometric
Method) ... 6
6.3 Continuous Determination of Ferric Oxide and Titanium Dioxide
(Spectrophotometric Method with Ferrotitanium Reagent) ... 9
6.4 Separate Determination of Titanium Dioxide (Diantipyryl Methane
Spectrophotometric Method) ... 12
6.5 Determination of Aluminum Oxide (Complexometric Titration with Villiaumite
Replacing EDTA) ... 14
6.6 Determination of Calcium Oxide (EGTA Complexometric Titration) ... 16
6.7 Determination of Magnesium Oxide (EDTA Complexometric Titration) ... 18
7 Macro-analysis Method of Silicon Dioxide, Ferric Oxide, Aluminum Oxide, Calcium
Oxide, Magnesium Oxide and Titanium Dioxide ... 20
7.1 Determination of Silicon Dioxide (Animal Glue Condensing Mass Method) ... 20
7.2 Continuous Determination of Ferric Oxide and Aluminum Oxide
(Complexometric Titration with EDTA) ... 22
7.3 Determination of Calcium Oxide (EDTA Complexometric Titration) ... 26
7.4 Determination of Magnesium Oxide (Complexometric Titration with EDTA,
Subtraction Method) ... 28
7.5 Determination of Titanium Dioxide (Spectrophotometric Method with
Hydrogen Peroxide) ... 30
8 Determination of Sulfur Trioxide ... 32
8.1 Barium Sulfate Mass Method ... 32
8.2 Combustion Neutralization Method ... 34
8.3 Coulomb Titration ... 38
9 Determination of Phosphorus Pentoxide (Phosphorus Molybdenum Blue
Spectrophotometric Method) ... 41
9.1 Method 1 ... 41
9.2 Method 2 ... 43
10 Determination of Potassium Oxide and Sodium Oxide (Flame Photometry) ... 46
11 Method for Determination of Potassium, Sodium, Ferrum, Calcium, Magnesium
and Manganese (Atomic Absorption Method) ... 48
12 Test Report ... 53
Foreword
This standard replaces GB/T 1574-1995 Analysis of Coal Ash, GB/T 4634-1996
Determination of Potassium, Sodium, Iron, Calcium, Magnesium and Manganese in
Coal Ash by Atomic Absorption Spectrometric Method, and GB/T 18856.13-2002 Test
Methods for Quality of Coal Water Mixture - Part 13. Determination for the Ash of Coal
Water Mixture. This standard integrates the 3 standards - GB/T 1574-1995, GB/T
4634-1996 and GB/T 18856.13-2002.
Compared with GB/T 1574-1995, GB/T 4634-1996 and GB/T 18856.13-2002, the
main changes of this standard are as follows.
— The volume of standard working solution of titanium dioxide was modified (6.3.3.1
in GB/T 1574-1995; 6.3.3.1.1 in this edition);
— A method to separately determine titanium dioxide was added (see 6.4);
— Wrong units were modified (9.1.2.10 and 9.1.2.11 in GB/T 1574-1995; 9.2.2.10
and 9.2.2.11 in this edition);
— Errors in formula were modified (9.2.7 in GB/T 1574-1995; Formula 26 in 9.2.4 of
this edition);
— Content of "note" was added (see 11.2);
— Appendix A in the former standard (GB/T 4634-1996) was deleted.
This standard was proposed by the China National Coal Association.
This standard shall be under the jurisdiction of National Technical Committee on Coal
of Standardization Administration of China.
Drafting organization of this standard. the Coal Analysis Laboratory of Coal Research
Institute.
Chief drafting staffs of this standard. Zhang Kerui, Xia Huili, Chen Suize, Deng Xiumin,
Zhou Guoyue, Wang Zhiqian, and Sui Yan.
The previous editions replaced by this standard are as follows.
- GB 1574-1979, GB/T 1574-1995;
- GB/T 4634-1984, GB/T 4634-1996;
- GB/T 18856.13-2002.
Test Method for Analysis of Coal Ash
1 Scope
This standard specifies the reagents and materials, instruments and equipment,
analysis procedure, result calculation and method precision for the determination of
ferrum, calcium, magnesium, potassium, sodium, manganese, phosphorus, silicon,
aluminum, titanium and sulphur in coal ash.
This standard is applicable to coal, coke, coal water slurry and coal gangue.
2 Normative References
The following documents contain provisions which, through reference in this text,
constitute provisions of this standard. For dated references, subsequent amendments
(excluding correction) or revisions of these publications do not apply. However, the
parties who enter into agreement according to these specifications are encouraged to
research whether the latest editions of these labels are applicable. For any undated
references, the latest edition of the document referred to applies.
GB/T 483 General Rules for Analytical and Testing Methods of Coal
3 Reagents
Water mentioned in this standard is deionized water or distilled water with equivalent
purity.
4 Instruments and Equipment
4.1 Muffle furnace. with temperature regulating device, thermocouple, and
pyrometer; it can maintain at (815 ± 10) °C and shall have corresponding
constant-temperature area; upper part of its back wall is chimney with diameter of
25mm~30mm, lower part has a hole (for insertion of thermocouple) whose position
shall be such that the heat contact-point of the thermocouple can be 20mm~30mm
away from the furnace bottom; a ventilation hole (diameter. about 20mm) shall be on
the furnace door.
4.2 High-temperature muffle furnace. with temperature control device; it can
maintain at (1000±10)°C.
6.3 Continuous Determination of Ferric Oxide and Titanium Dioxide
(Spectrophotometric Method with Ferrotitanium Reagent)
6.3.1 Method summary
Under the condition of pH= 4.7~4.9, ferric ion reacts with ferrotitanium reagent to
generate purple complex; use spectrophotometric method to determine ferric oxide.
Add adequate amount of ascorbic acid, so that purple of the solution disappears;
titanic ion reacts with ferrotitanium reagent to generate yellow complex, use
spectrophotometric method to determine titanium dioxide.
6.3.2 Reagents and materials
6.3.2.1 Ascorbic acid.
6.3.2.2 Ferrotitanium reagent solution. 20 g/L. Weigh 2 g of ferrotitanium reagent
(C6H4O8S2Na2); dissolve it into water; dilute to 100 mL with water.
6.3.2.3 Ammonia water (GB/T 631). volume ratio is (1+6).
6.3.2.4 Hydrochloric acid (GB/T 622) solution. volume ratio is (1 + 19).
6.3.2.5 Sulfuric acid solution. volume fraction is 50mL/L. Measure 5 mL of sulfuric
acid (GB/T 625); add water slowly; dilute to 100 mL with water.
6.3.2.6 Buffer solution. pH = 4.7. Weigh 68 g of sodium acetate trihydrate
(CH3COONa3H2O) (GB/T 693) or 41 g of anhydrous sodium acetate (CH3COONa)
(GB/T 694); place into a 400 mL beaker; add water to dissolve; add 29 mL of glacial
acetic acid (GB/T 676); dilute to 1 L with water.
6.3.2.7 Standard stock solution of ferric oxide. 1 mg/mL.
Accurately weigh 1.0000g (accurate to 0.0002g) of ferric oxide GR which has been
dried at 105°C~110°C for 1 h; place it in a 400 mL beaker; add 50mL of concentrated
hydrochloric acid (GB/T 622, GR); put on watch-glass; heat it until they are diss...
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(Above excerpt released/modified date: 2015-04-18 / 2019-03-24. Translated/reviewed by: Wayne Zheng et al.)
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